SPR 20-585: Establishing Roadway Cross-Slopes During Resurfacing Projects

Many of Kentucky's mral roads were built over existing wagon trails and paths to connect common points of travel for Kentuckians. Unlike modern roadway design, which take speed, geometry, and frictional forces into consideration to provide superelevations in horizontal curves and the rates of change to provide a safer roadway and more comfortable driving experience, these older roads were built with a typical 2% crown slope. This 2% crown slope continues through ho1-izontal curves, which causes the vehicle to be directed away or pushed away from the direction of travel. Not only is this less safe for the traveling public but it is often an uncomfortable feeling for the driver. The objective of the research project is to establish a practical method for KYTC Engineers/Inspectors to determine proper pavement super elevations and tun-on/ off distances in horizontal cm-ves for maintenance resm-facing projects on rural roads.